WASHINGTON -- The National Security Agency intercepted private e-mail messages and phone calls of Americans in recent months on a scale that went beyond the broad legal limits established by Congress last year, according to government officials.
Several intelligence officials, as well as lawyers briefed about the matter, said the N.S.A. had been engaged in "over-collection" of domestic communications of Americans. They described the practice as significant and systemic, although one official said it was believed to be unintentional.
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